I saw the show but was disappointed that they didn't touch on some of the underlying factors of how we got here. Simply put the move to automation and remote control of machinery has been a result of a desire to reduce labor costs, and de-unionization.

None of this was a problem in the 70s. Yes, in part because computer and networking technology didn't exist but a large factor in this is simply because power plants, generation stations and switch-yards were largely operated manually.

One of the most powerful security measures is manual control. Common sense, alertness, eyes and ears on site, are hard to remotely hack.

I'm not advocating going back to total manual control. Humans get tired, bored, lose alertness, get distracted. Automated systems are always alert 24/7. Automation has been, for the most part, beneficial. But computers don't have common sense. They are quite credulous. The strongest security is the combination of the 24/7 alertness and memory of computers with the common sense and intuitive insight of a human operator.